DTC P2138

DTC P2138  : APP Sensor A/B (TP Sensor D/E) Incorrect Voltage Correlation

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Press the accelerator pedal to the floor.

   -4. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P2138 APP Sensor A/B (TP Sensor D/E) Incorrect Voltage Correlation

   Is DTC P2138 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the APP sensor and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot .

2. APP sensor signal check

   -1. Check the parameter (s) below with the HDS.

   Signal	Current conditions
   	Values	Unit
   APP SENSOR A
   APP SENSOR B

   Are they the same voltage?

   YES 

   Go to step 3.

   NO 

   Replace the APP sensor .

3. Determine possible failure area (PCM, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Jump the SCS line with the HDS.

   -3. Disconnect the following connector.

   PCM connector A (51P)

   -4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   Test point 1	PCM connector A (51P) No. 28
   Test point 2	PCM connector A (51P) No. 29

   Is there continuity?

   YES 

   Go to step 4.

   NO 

   Update the PCM if it does not have the latest software, or substitute a known-good PCM , then recheck. If DTC P2138 goes away and the PCM was updated, troubleshooting is complete. If DTC P2138 goes away and the PCM was substituted, replace the original PCM .

4. Shorted wire check (APS1 line to APS2 line)

   -1. Disconnect the following connector.

   APP sensor 6P connector

   -2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   	APP sensor 6P connector: disconnected
   Test point 1	PCM connector A (51P) No. 28
   Test point 2	PCM connector A (51P) No. 29

   Is there continuity?

   YES 

   Repair a short in the APS1 wire to the APS2 wire between PCM connector terminals A28 (APS1 line) and A29 (APS2 line).

   NO 

   The APS1 and APS2 wires are OK. Replace the APP sensor .